引入mp生成器依赖

pom.xml

<!-- 代码生成器 -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.5.1</version>
</dependency>
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity</artifactId>
    <version>1.7</version>
</dependency>

新建utils导入快速生成配置文件

CodeGenerator.java

package com.zj.demo.utils;

import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.OutputFile;

import java.util.Collections;

/**
 * mp代码生成器
 * by Joyce
 * @since 2023-01-04
 */
public class CodeGenerator {

    public static void main(String[] args) {
        generate();
    }

    private static void generate() {
        FastAutoGenerator.create("jdbc:mysql://localhost:3306/joyce?serverTimezone=GMT%2b8", "root", "123456")
                .globalConfig(builder -> {
                    builder.author("Joyce") // 设置作者
                            .enableSwagger() // 开启 swagger 模式
                            .fileOverride() // 覆盖已生成文件
                            .outputDir("E:\\Springboot2-project\\管理系统demo\\springboot\\src\\main\\java\\"); // 指定输出目录
                })
                .packageConfig(builder -> {
                    builder.parent("com.zj.demo") // 设置父包名
                            .moduleName(null) // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, "E:\\Springboot2-project\\管理系统demo\\springboot\\src\\main\\resources\\mapper\\")); // 设置mapperXml生成路径
                })
                .strategyConfig(builder -> {
                    builder.entityBuilder().enableLombok();
//                    builder.mapperBuilder().enableMapperAnnotation().build();
                    builder.controllerBuilder().enableHyphenStyle()  // 开启驼峰转连字符
                            .enableRestStyle();  // 开启生成@RestController 控制器
                    builder.addInclude("sys_user") // 设置需要生成的表名
                            .addTablePrefix("t_", "sys_"); // 设置过滤表前缀
                })
//                .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();

    }
}

生成器运行

备份一下文件User.xml以及UserController
因为运行生成器之后就覆盖了

配置说明:
https://baomidou.com/pages/981406/#%E5%8F%AF%E9%80%89%E9%85%8D%E7%BD%AE 在这里插入图片描述
将依赖里的对应文件复制到我们template文件夹下

在这里插入图片描述
删除我们之前的User.xml，
注释原来UserService的@Service注解

进行自定义配置
controller.java.vm

package ${package.Controller};


import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import java.util.List;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import ${package.Service}.${table.serviceName};
import ${package.Entity}.${entity};

#if(${restControllerStyle})
import org.springframework.web.bind.annotation.RestController;
#else
import org.springframework.stereotype.Controller;
#end
#if(${superControllerClassPackage})
import ${superControllerClassPackage};
#end

/**
 * <p>
 * $!{table.comment} 前端控制器
 * </p>
 *
 * @author ${author}
 * @since ${date}
 */
#if(${restControllerStyle})
@RestController
#else
@Controller
#end
@RequestMapping("#if(${package.ModuleName})/${package.ModuleName}#end/#if(${controllerMappingHyphenStyle})${controllerMappingHyphen}#else${table.entityPath}#end")
#if(${kotlin})
class ${table.controllerName}#if(${superControllerClass}) : ${superControllerClass}()#end

#else
#if(${superControllerClass})
public class ${table.controllerName} extends ${superControllerClass} {
#else
public class ${table.controllerName} {
#end

    @Resource
    private ${table.serviceName} ${table.entityPath}Service;

    // 新增或者更新
    @PostMapping
    public boolean save(@RequestBody ${entity} ${table.entityPath}) {
        return ${table.entityPath}Service.saveOrUpdate(${table.entityPath});
    }

    @DeleteMapping("/{id}")
    public Boolean delete(@PathVariable Integer id) {
        return ${table.entityPath}Service.removeById(id);
    }

    @PostMapping("/del/batch")
    public boolean deleteBatch(@RequestBody List<Integer> ids) {
        return ${table.entityPath}Service.removeByIds(ids);
    }

    @GetMapping
    public List<${entity}> findAll() {
        return ${table.entityPath}Service.list();
    }

    @GetMapping("/{id}")
    public ${entity} findOne(@PathVariable Integer id) {
        return ${table.entityPath}Service.getById(id);
    }

    @GetMapping("/page")
    public Page<${entity}> findPage(@RequestParam Integer pageNum,
                                @RequestParam Integer pageSize) {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.orderByDesc("id");
        return ${table.entityPath}Service.page(new Page<>(pageNum, pageSize), queryWrapper);
    }

}

#end

配置完再运行一下CodeGenerator，得到生成的Controller,然后在Page请求加入自己的参数

Controller.java

package com.zj.demo.controller;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.zj.demo.entity.User;
import com.zj.demo.service.IUserService;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author Joyce
 * @since 2023-01-04
 */
@RestController
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

    // 新增或者更新
    @PostMapping
    public boolean save(@RequestBody User user) {
            return userService.saveOrUpdate(user);
            }

    @DeleteMapping("/{id}")
    public Boolean delete(@PathVariable Integer id) {
            return userService.removeById(id);
            }

    @PostMapping("/del/batch")
    public boolean deleteBatch(@RequestBody List<Integer> ids) {
            return userService.removeByIds(ids);
            }

    @GetMapping
    public List<User> findAll() {
            return userService.list();
            }

    @GetMapping("/{id}")
    public User findOne(@PathVariable Integer id) {
            return userService.getById(id);
            }

    @GetMapping("/page")
    public Page<User> findPage(@RequestParam Integer pageNum,
                               @RequestParam Integer pageSize,
                               @RequestParam(defaultValue ="") String username,
                               @RequestParam(defaultValue ="") String email,
                               @RequestParam(defaultValue ="") String address
                               ) {
            QueryWrapper<User> queryWrapper = new QueryWrapper<>();
            if (!"".equals(username)) {
                queryWrapper.like("username", username);
            }
            if (!"".equals(email)) {
                queryWrapper.like("nickname", email);
            }
            //和上面的if判断效果一样
            queryWrapper.like(!address.equals(""),"address", address);
            queryWrapper.orderByDesc("id");
            return userService.page(new Page<>(pageNum, pageSize), queryWrapper);
            }
}